From: Richard Sandiford <rsandifo@redhat.com>
To: "Bradley D. LaRonde" <brad@laronde.org>
Cc: <uclibc@uclibc.org>, <linux-mips@linux-mips.org>
Subject: Re: uclibc mips ld.so and undefined symbols with nonzero symbol table entry st_value
Date: Mon, 10 May 2004 21:41:53 +0100 [thread overview]
Message-ID: <87oeowkoa6.fsf@redhat.com> (raw)
In-Reply-To: <01a901c436ce$7029d890$8d01010a@prefect> (Bradley D. LaRonde's message of "Mon, 10 May 2004 16:36:14 -0400")
"Bradley D. LaRonde" <brad@laronde.org> writes:
> I read this in the spec:
>
> All externally visible symbols, both defined and undefined,
> must be hashed into the hash table.
>
> Should libpthread's malloc stub be added to the hash table?
Yes.
> I guess not, but I think that might be happening (haven't verified),
> and libdl finding it in there and thinking it is the real deal, not
> realizing it is just a stub.
If you have an undefined function symbol with st_value != 0, then
that st_value must be for a stub. That's how the loader can (and is
supposed to) tell the difference.
It's probably a good idea to look at how glibc handles this.
Richard
WARNING: multiple messages have this Message-ID (diff)
From: Richard Sandiford <rsandifo@redhat.com>
To: "Bradley D. LaRonde" <brad@laronde.org>
Cc: uclibc@uclibc.org, linux-mips@linux-mips.org
Subject: Re: uclibc mips ld.so and undefined symbols with nonzero symbol table entry st_value
Date: Mon, 10 May 2004 21:41:53 +0100 [thread overview]
Message-ID: <87oeowkoa6.fsf@redhat.com> (raw)
Message-ID: <20040510204153.c4BUGqRWamJ86vtOelc0H76tORF08gKHrTkUI7X3TTA@z> (raw)
In-Reply-To: <01a901c436ce$7029d890$8d01010a@prefect> (Bradley D. LaRonde's message of "Mon, 10 May 2004 16:36:14 -0400")
"Bradley D. LaRonde" <brad@laronde.org> writes:
> I read this in the spec:
>
> All externally visible symbols, both defined and undefined,
> must be hashed into the hash table.
>
> Should libpthread's malloc stub be added to the hash table?
Yes.
> I guess not, but I think that might be happening (haven't verified),
> and libdl finding it in there and thinking it is the real deal, not
> realizing it is just a stub.
If you have an undefined function symbol with st_value != 0, then
that st_value must be for a stub. That's how the loader can (and is
supposed to) tell the difference.
It's probably a good idea to look at how glibc handles this.
Richard
next prev parent reply other threads:[~2004-05-10 20:41 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-03 21:25 uclibc mips ld.so and undefined symbols with nonzero symbol table entry st_value Bradley D. LaRonde
2004-05-03 21:25 ` Bradley D. LaRonde
2004-05-09 13:14 ` Richard Sandiford
2004-05-09 13:14 ` Richard Sandiford
2004-05-09 20:52 ` Bradley D. LaRonde
2004-05-09 20:52 ` Bradley D. LaRonde
2004-05-10 7:40 ` Richard Sandiford
2004-05-10 7:40 ` Richard Sandiford
2004-05-10 18:05 ` Bradley D. LaRonde
2004-05-10 18:05 ` Bradley D. LaRonde
2004-05-10 18:21 ` Richard Sandiford
2004-05-10 18:21 ` Richard Sandiford
2004-05-10 20:36 ` Bradley D. LaRonde
2004-05-10 20:36 ` Bradley D. LaRonde
2004-05-10 20:41 ` Richard Sandiford [this message]
2004-05-10 20:41 ` Richard Sandiford
2004-05-10 20:44 ` Richard Sandiford
2004-05-10 20:44 ` Richard Sandiford
2004-05-11 3:39 ` Bradley D. LaRonde
2004-05-11 3:39 ` Bradley D. LaRonde
2004-05-11 5:48 ` [uClibc] Re: uclibc mips ld.so and undefined symbols with nonzerosymbol " Joakim Tjernlund
2004-05-11 5:48 ` Joakim Tjernlund
2004-05-11 14:03 ` uclibc mips ld.so and undefined symbols with nonzero symbol " Daniel Jacobowitz
2004-05-11 14:21 ` Bradley D. LaRonde
2004-05-11 14:21 ` Bradley D. LaRonde
2004-05-11 14:23 ` Daniel Jacobowitz
2004-05-11 16:33 ` [uClibc] Re: uclibc mips ld.so and undefined symbols with nonzerosymbol " Joakim Tjernlund
2004-05-11 16:33 ` Joakim Tjernlund
2004-05-11 16:55 ` Bradley D. LaRonde
2004-05-11 16:55 ` Bradley D. LaRonde
2004-05-11 21:50 ` Joakim Tjernlund
2004-05-11 21:50 ` Joakim Tjernlund
2004-05-10 12:21 ` Joakim Tjernlund
2004-05-10 12:21 ` Joakim Tjernlund
2004-05-10 12:36 ` Joakim Tjernlund
2004-05-10 12:36 ` Joakim Tjernlund
2004-05-10 14:23 ` Joakim Tjernlund
2004-05-10 14:23 ` Joakim Tjernlund
2004-05-11 7:27 ` [uClibc] Re: uclibc mips ld.so and undefined symbols withnonzerosymbol " Joakim Tjernlund
2004-05-11 7:27 ` Joakim Tjernlund
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